MGD Expression to diagnose and treat at the slit lamp.
Meibomian gland expression is a diagnostic step and a first-line treatment in one. Grade what the glands yield, stage the MGD, then clear the obstruction so the glands can resume normal function. In-office expression has at least an 80-year history.
Obstructed glands hold thickened meibum that will not flow on its own. Diagnostic expression shows how far the dysfunction has gone; therapeutic expression clears it.
Diagnostic expression
Done first, to confirm MGD and stage its severity. Press and hold a finger or cotton-tip applicator against the lower lid for about 5 to 15 seconds and watch the gland orifices at the slit lamp. The central to nasal lower lid is the most informative area.
Grades meibum quality and expressibility
Blink-level, calibrated pressure with the Meibomian Gland Evaluator
A more complete expression of every gland to evacuate the obstruction so the gland can resume normal function. Warm first, then press the lid against a rigid backstop on the inner lid surface, which protects the globe and lets more force reach the glands.
Warm the lids first
Backstop on the inner lid, pressure on the outer lid
Finger and cotton-tip pressure changes from one examiner, and one visit, to the next. The Meibomian Gland Evaluator applies a standard, spring-calibrated force of 1.25 g/mm² over 40 mm², about eight glands, which approximates the force the lids apply during a natural blink. A gland that yields liquid oil at that force is a functioning gland.
1.25 g/mm²calibrated, blink-level force
8 glandsper placement, 40 mm²
24glands across the lower lid
Count the glands yielding liquid secretion (MGYLS) in the nasal, central and temporal thirds of the lower lid
The MGYLS count correlates with dry eye symptoms
The temporal third is the most likely to have no functioning glands: 86% of temporal thirds versus 6% of nasal thirds
The same force every time, so follow-up counts are comparable
Do not depress the shaft to the endpoint of the spring or add force after it has been depressed about 6 mm. Disinfect with alcohol between patients.
Grading
Grade what comes out.
The MGD Workshop scales score meibum quality and expressibility separately. Record both at baseline and at every follow-up.
Meibum quality
Each of eight glands in the central third of the lower lid, scored 0 to 3. Total 0 to 24.
0ClearHealthy meibum, like olive oil.
1CloudyTurbid secretion, an early sign of MGD.
2Cloudy with debrisGranular secretion.
3Thick, like toothpasteInspissated meibum, advanced MGD.
Expressibility
Five glands of the lower or upper lid, scored by how many express.
0All glands expressible
1Three to four glands
2One to two glands
3No glands expressible
No meibum with clear orifices may mean the glands have atrophied; therapeutic expression will yield little, and meibography shows how much gland remains.
Where expression fits, stage by stage.
The MGD Workshop staged algorithm builds treatment up as expressibility, meibum quality, symptoms and staining worsen.
Stage
MGD grade
Symptoms and staining
Treatment
Stage 1
Minimally altered expressibility and secretion quality
No symptoms; no corneal staining
Inform the patient about MGD, diet, environment and drying medications. Consider eyelid hygiene, including warming and expression.
Stage 2
Mildly altered expressibility and secretion quality
Minimal to mild symptoms; none to limited staining
Eyelid warming for a minimum of four minutes, once or twice daily, followed by moderate to firm massage and expression. Consider lubricants and other topical therapy.
Stage 3
Moderately altered expressibility and secretion quality
Moderate symptoms; mild to moderate, mainly peripheral staining
All of the above, plus oral tetracycline derivatives, bedtime lubricant ointment and anti-inflammatory therapy as indicated.
Stage 4
Severely altered expressibility and secretion quality
Marked symptoms; marked staining, central in addition
All of the above, plus anti-inflammatory therapy for dry eye.
Plus disease, such as Demodex-related anterior blepharitis, chalazion or anterior blepharitis, can occur at any stage and is treated alongside. For Demodex blepharitis, see XDEMVY ›
The procedure
Therapeutic expression, start to finish.
Expression outside the slit lamp gives more freedom of movement; magnification is still needed to diagnose.
Warm the lids
Apply a warm compress for about 10 minutes before therapeutic expression to soften the meibum. A drop of topical anesthetic is usually not needed for diagnostic expression but may help for extensive therapeutic expression.
Protect the cornea
Have the patient look up for lower lid expression and down for upper lid expression.
Lower lid
Starting nasally, pull the lid down to expose the gland orifices and palpebral conjunctiva. Place a paddle or saline-moistened cotton tip on the palpebral conjunctiva midway between the fornix and the lashes, then press the outer lid with a second applicator and roll or rock from the base of the glands toward the orifices. Move section by section across the lid.
Upper lid
With the patient looking down, lift the lid slightly off the globe, insert the cotton tip or paddle midway between the superior fornix and the lashes, and roll or rock downward to express. Repeat across the lid.
After the procedure
Artificial tears in the office soothe the palpebral conjunctiva. Set expectations: one expression is not a permanent cure, and MGD needs long-term management at home.
Technique adapted from Hatley and Lighthizer, Review of Optometry; force thresholds from the MGD Workshop management report.
When manual expression is not enough.
TFOS DEWS III lists device-driven lid warming, intense pulsed light and low-level light therapy among in-office MGD treatments.
What is the difference between diagnostic and therapeutic expression?
Diagnostic expression is a short, held press on the lower lid to see what the glands yield and grade it. Therapeutic expression is a more complete expression of all glands, usually after warming, to clear the obstruction.
How is meibum graded?
In the MGD Workshop scheme, meibum quality is scored 0 to 3 in each of eight glands of the central third of the lower lid (0 clear, 1 cloudy, 2 cloudy with debris, 3 thick like toothpaste; total 0 to 24). Expressibility is scored 0 to 3 across five glands (0 all expressible, 1 three to four, 2 one to two, 3 none).
Why use the Meibomian Gland Evaluator instead of a cotton tip?
It applies the same spring-calibrated force of 1.25 g/mm² over about eight glands every time, approximating the force of a natural blink. The count of glands yielding liquid secretion at that force reflects how many glands work during everyday blinking, and it is comparable from visit to visit and examiner to examiner. Standardized instrumentation for diagnostic expression has been described as desirable if not mandatory.
What if nothing comes out?
If no meibum appears and the orifices look clear, the glands may have atrophied, and therapeutic expression will yield little. Meibography shows how much gland structure remains.
How much pressure is too much?
Force is usually limited by pain rather than by what can be applied. Pain rises rapidly above about 15 g/mm² (about 5 PSI), and forces of 80 g/mm² (about 25 PSI) or more frequently produce excruciating pain. A rigid backstop on the inner lid protects the globe.
Do I need anesthetic?
Usually not for diagnostic expression. A drop of topical anesthetic may be warranted for more extensive therapeutic expression, depending on the patient.
How long should patients warm their lids at home?
The MGD Workshop staged algorithm calls for eyelid warming for a minimum of four minutes, once or twice daily, followed by moderate to firm massage and expression, from stage 2 onward.
Which instruments are used?
Techniques range from cotton-tip applicators to expressor paddles placed inside the lid and forceps-style expressors for one-handed use. Dry Eye Rescue carries the Meibomian Gland Evaluator for standardized diagnostic expression, plus warm compresses and lid hygiene for home care. Flat-tip and round-tip expressor forceps are coming soon.
Where do in-office heat devices fit?
Thermal pulsation, lid heating systems, intense pulsed light and low-level light therapy all target MGD. TFOS DEWS III lists device-driven lid warming, IPL and LLLT among in-office MGD treatments.
References
Korb DR, Blackie CA. Meibomian gland diagnostic expressibility: correlation with dry eye symptoms and gland location. Cornea. 2008;27(10):1142-7. PubMed
Ioussifova M, Kataria H. Tackle MGD with These Hands-on Interventions. Review of Optometry. October 11, 2023. Read article
Geerling G, et al. The International Workshop on Meibomian Gland Dysfunction: Report of the Subcommittee on Management and Treatment. Invest Ophthalmol Vis Sci. 2011;52(4):2050-64. PubMed
Tomlinson A, et al. The International Workshop on Meibomian Gland Dysfunction: Report of the Diagnosis Subcommittee. Invest Ophthalmol Vis Sci. 2011;52(4):2006-49. PubMed
Jones L, et al. TFOS DEWS III: Management and Therapy. Am J Ophthalmol. 2025;279:289-386. PubMed
Wolffsohn JS, et al. TFOS DEWS III: Diagnostic Methodology. Am J Ophthalmol. 2025;279:387-450. PubMed
Hatley J, Lighthizer N. How to Impress (and Express) Your Patients. Review of Optometry. May 15, 2015. Read article
Make expression part of every dry eye exam.
Grade the glands at baseline, treat the obstruction, and keep patients warming and cleaning between visits.
This page summarizes published clinical guidance for eye care professionals and does not replace clinical judgment. Product names are trademarks of their respective manufacturers. Review each manufacturer's instructions for use before use.